Draw works



` Mar. 3. 1925. 1,528,139

i... WILKINSON DRAW WORKS Filed March l?, 1924 7 sheets-sheet 1 VU as N E N w anni E E wml;

Mar.. 3. 1925.

L. WILKINSON DRAW WORKS Filed March 17, 1924 7 Sheets-Sheet 2 33' 35' 34' G f I Mar. 3. 1925.

L. WILKINSONv DRAW WORKS z 4 m 4 n 3 o0 m 031 ad 4 .o M 4 ,4 4 du ,Lm v #/@07 Z Jv` l...( d f 4 Md 5 6 5 oo /o www n. o 4 4 5 ,4 HHN Ew 3 11 vmuw. T W5.. llll al H|4|l||| III!! zu 7/ W 4H H /O l56. MMMMWMUM Il 3. J f l|.||| l .I w y, -VHHIM v 2o@ l l Nx 8 M, M 5 \\\\\\\Q@ Mar. 3. 1925.

L. WILKINSON Y DRAW WORKS Filed Maxon 17, 1924 7 sheets-sheet 4 Mar. 3. 1925.

L. WILKINSON DRAW WORKS Filed March 17, 1924 '7 Sheets-Sheet 5 Mar. 3. 1925. 1,528,139

Filed Maron 1711924h e Mar. 3. 1925. 1,528,139 K L. WILKINSON DRAW WORKS Filed March 17, 1924 7 Sheets-Sheet '7 Patented Mar. 3, 192.5.

.UNITED STATES LEE WILKINSON, OE s'oUR. LAKE, TEXAS. l

- DRAW WORKS.

Application led March 17, y1924. Serial No. 699,750.

One object of the 1nvent1on 1s to provide,

in well drilling apparatus, a draw worksY which may be controlled in a novel manner by utilizing fluid pressure in the operation of the clutches and brakes embodied in the draw works, as now constructed.

Another object of the invention resides in the provision of a draw works equipped with the usual clutches and brakes, now, in common use, and also equipped with means for applying fluid ressure tof operate the clutches and bra es, and embodying also novel types of valves through which said fluid pressure may be controlled and applied. y. f

With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation, and arrangement of parts, an example of which is given in this specication and illustrated in the accompanying drawings, wherein A Figure 1 shows an" elevation of the oomplete draw works equipped with the fluid pressure controlled a paratus.

Figure 2 shows a p an view of the clutch controlling valve mechanism employed.

Figure 3 shows a side view thereof.-

Figure 4 shows a bot-tom view thereof.

Figure 5 shows a vertical sectional view thereof.

Figure 6 shows across sectional `view taken on the line 6-6 of Figure 3.

Figure 7 shows a cross sectional view on the line 7-7 of Figure 3.

Figure 8 shows a plan view of the valve embodied in said clutch controlling valve mechanism.

Figure 9 shows a side elevation of said valve.

Figure 10 shows a plan lView of a brake cont-rolling valve mechanism employed.

Figure 11 shows a vertical sectional view thereof taken on the line 11-11 of Figure 10.

Figure 12 shows a vertical sectional view taken at right angles to the view shown in Figure 11.

Figure 13 shows a plan view of a reversing valve mechanism employed.

Figure 14 shows a vertical sectional view thereof.

Figure 15 shows a cross sectional view thereof on the line 15-15 of Figure 14.

Figure 16 shows a cross sectional view thereof on the line 16-16 of Figure 14.

Figure 17 shows a cross sectional view thereof on the line 17-17 of Figure 14.

Figure 18 is a cross sectional view of the brake controlling valve taken on the line 18-18 of Figure 12.

Figure 19 is a cross sectional view thereof taken on the line 19-19 of Figure 12.

Figure 2,0 shows a longitudinal sectional View of one of the uid pressure cylinders employed; and

Figure 21 shows a sectional view thereof, taken on the line 21-21 of Figure 20.

Referring now more particularly to the drawings, wherein like numerals of refer-l ence des1gnate similar arts 1n each of the figures, the numeral 1 esignates the frame-A work, as awhole, of the draw works, which`v includes the upright side beams 2, 2, spaced apart.

Rotatably mounted in suitable bearings, carried by the side beams there is a line shaft# 3 which has the sprockets 4, 5, and 6, fixed thereon. The sprocket 5 is rovided to drive said shaft through. the medlum of a suitable sprocket chain (not shown) which, in turn is driven in Jche usual way, from the engine or other power employed.

Mounted in the framework, there is alsov the rotatable drum shaft 7 which has the cable winding drum 8, fixed thereon, said drum having ythe end brake flanges 9,- 9, formed integrally therewith. These flanges are surrounded by the usual brake bands 10, 10, each of which is permanently fixed, at one end, and whose other ends are connected t-o the offset wrists 11, 11, of the brake shaft 12 which is rotatable in suitable bearings carried by the framework.Y One end of the brake shaft carries a fixed arm 13, for a p'urpose hereinafter to be explained.

The line shaft also carries .a loosely mounted sprocket wheel 14, the outer end of the hub of which is formed 'with a clutch yjaw 15, and splined on saidshaft is a jaw sprocket wheels 18 `and 19 loosely mounted n able sprocket chains (not shown).

thereon, the outer ends of the hubs of which are ,formed withclutch jaws and 21, respectively. These sprocket wheels are aligned with the respective sprocket Wheels 4 and 6, and are driven therefrom b v suit- Splined on the drum shaft` 7, and adapted to be clutched with, and disengaged from the respective sprockets 18 and 19, are the clutches 22 and 23. There are the pivoted shift levers 24 and 25, which are connected, at one end, to the respective clutches 22 and 23. The outer, or free, ends of the shift levers 17, 24 and 25 arerconnected to the plunger rods 26, 27 and 28, respectively, of the plungers 29, which work in thel respective cylinders i 30, 31, and 32.

rRespective pairs of pressure lines 33, 33; 34, 34; and 35, 35, lead from the valve casing 36, of the clutch controlling valve, and enter the respective cylinders 30, 31, and 32, on opposite sides of the plungers thereof,

l as -illustrated in Figures 20 and 21.

, The clutch controlling valve mechanism embodies the hollow cylindrical casing 36 with the inlet pressure line 37 enteringjthe bottom thereof. Within the cylinder there is .a close fitting valve 38 which is mounted on a valve rod 39.l y.This rod has its lower end fitted through a suitable bearing in the lower end of the casing and the rod works through a stuffing box 40, carried by the upper end of the casing.v I

An intermediate section of the rod`39 is formed with a substantially square section which fits into a lateral slot 41, cut in the Valvefand a coil spring surrounds the valve rod and is interposed between the top end of the casing and the valve. The valve rests on an annular rib 42, preferably formed integrally with the rod 39. rl`he valve is somewhat shorter than the inside lengthwise diameter of the casing, vand has a limited endwise movement therein. l

The valve is cast substantially hollow so as toi provide the channels 43` 43, therethrough it from end to end. rllhe pressure iuid entering the casing will passupwardly through the channels 43 to the chamber 47 in the casing, above the valve. The pressure lines 33, 33; 34. 34, and 35, 35 enter the casing 36 through the tapped holes 33', 33';

34', 34', and 35',35', respectively. Thevalve casing also has a relief, or outlet port 44.A

One side of the valve 38 has the counter sunk portions forming chambers 45 and 46, separated by a rib 48.` rlhe chambers 47 and 45, respectively, have the corresponding lengthwise channels 49 and 50.

There is an operating lever 51, connectedk at a rotatable `anchor 58, carried by the ,upper end toy the casing by means of the link 52. The opposite end of the lever is formed into a suitable hand grip and the upper end of the rod 39, is pivoted to said lever intermediate its ends. The lever 51 has a depending integral dog 53 adapted to engage with a notched segmental rack 54, formed on the corresponding side of the casmg sired, by lifting the free end of the lever 51 to disengage the dog 53 from said rack, and, then swing the lever to rotate the valve, as desired.

The pressure through the lines 33, 34 and 35 may be controlled by this'valve. For eX- ample, the valve may be turned to alifm the channels With the lines 33, 33 in whic case pressure from the chamber 47 will enter one of said lines and the other line 33, will be connected into the relief chamber 45, which end. vThe valve may be rotated, as deat all times is connected with the relief port 44. The result will be that pressure fluid will be admitted into the cylinder 30 on one side of the plunger 29, and the pressure on the other side of said plunger will be relieved. The clutch 16 will accordingly be operated. When the valve is 'shiftedl to another position the pressure through the lines 33fwill be reversed, the one formerly .connected with the channel 49 being connected into the relief chamber 45 and the one formerly connected with the relief chamber 45 being connected into the pressure chamber 46. Similarly y'pressure may be supplied through the lines 34,".and 35 to the cylinders 31 and 32 on either side of the plunger therevided with a plunger 29 having a plunger rod, similar to the rod 26. This plunger rod is connected to the free end of the arm 13, and through the operation of the plunger in the cylinder 57 the bra-ke shaft v12 may be operated to set and release the brakes 10. The pressure in t-he Icylinder 57 is applied and released through `the brake Valve mechanism shown in Figures 10, `11, 12, 18 and 19. ,This valve mechanism includes a valve casing 5S, formed with au internal pressure chamber 59. The casing has a removable cover 60 andl is formed with dthe valve seat 61. There is a disc-like valve 62, in the chamber 59 which co-operates with the seat 61.v The valve 62 has a central depending stud 63 which rfits into a central bearing in the valve seat and fastened to the valve there is a valve operating rod 64,

Whichl Works through al central bearing 65, in the cover 60. Fastened to the upper end of the rod 64 there is a handle. 66, by means is formed. Within the valve seat 61,

there are the oppositely arranged arcuate chambers 69, 69, and leading from these chambers through the vlave seat there are the passageways 70, 70. Thepressure lines 71, 71, lead from the chambers 69, Y69, through the reversing valve shown in Figures 13 to 17, inclusive, and enterthe cylinder 57 on opposite sides ofthe plunger therein. A pressure line 72 enters the chamber 59 through the -port 72', seat 61, and a relief port 73 leads from said chamber, through said seat. The 'inner ends of the ports 7 2 and 73 terminate in arcuate countersunk channels 74 and 75 formed in the face of the valve seat and extending each way from -said ports. The valve 62, has a segemental notch 7 6, cut h1 one side thereof and opposite said notch the valve has a countersunk chamber 77 in its underside.

The chamber 59 is always in communication with the pressure line 72 since the notch 76 always registers in part at least, with the channel 74, and consequently the fluid in said chamber 59 is always under pressure. When the valve is turned to bring the notch 7 4. into registration with the ports 70 of one of the chambers 69, the pressure fluid will pass through said ports and into and through the corresponding line71 into one end of the cylinder 59, and pressure will be relieved from the other end of said cylinder through-the other line 71, said relleved fluid passing into the chamber 76, and thence through the channel 75, with -which saidx chamber 76 now registers, and out througl the relief port 73. The pressure may reversed by reversing the position of the valve 62, so as to bring the notch 76, into registration with tleports 70 of the'other chamber 69, and to shift the reliet chamber 76 out of registration with said last mentionedA chamber 69, and into registration with the otherv one. The valve 62 may, however, be turned t neutral position, as shown in Figures 10 and 11, in which position the notch i7 6 is out of registration with the ports of either pressure chamber 69 and pressure will `be thus en tirely cut olf from the cylinder-57. -When the clutches 22 and 23 are disengaged, the

'brakes'may thusbe applied or released directly by the operatibn of the brake valve mechanism above described.

In Figures 13 to 17, inclusive, I have shown a ressure reversing valve mechanism whidh will now be described The numeral 77 designates the casing of this mechanism 'into which the pressure lines 71, 71 are connected. In this casing there is fitted the rotary valve 7 8 which has a tapering fit in the casing, as shown,- and the respective lines 71 have a continuous direct connection, through the bores 7 9, 79, through said valve. These bores are normallyv held in alignment with their rspective pressure lines'71, 71 by means of a coil spring 80 which is fitted into the casing end and snrrounds the valve and has oneend` connected to said casing and the other end connected to the valve. The valve 78 also has the crossbores 81. and 82 at substantially right angles to each other. The valve may be turned to align the cross bores with opposite pressure lines 71, to in effect cross said lines. For examplethe,valve 78 may be turned so as to connect one of the lines 71 with the other through the cross bore 81, and similarly connect said lines through the cross bore 82.

The valve 78 lcarries a cross arm 83 Whose ends have the swiveling bearings 84, 84.

The free ends of the shift levers 2&1 and 25 I have the 'rods 85, 85, hinged thereto at one end and their other ends slide loosely through the 'corresponding bearings 84 and are formed with heads 86, 86 adapted to engage with said bearings so that a pull exerted through either rod 85 will operate to turn the valve correspondingly.

Then it is desired to drive the rotary pipe the rotary driving sprocket is clutched with the line shaft 3 by a suitable manipulation of the valve lever 51 so as to shift the clutch 16 into engagement. The other clutchesf22 and 23 will be automatically disengaged, as hereinbefore explained and the brake valve mechanism will usually be shifted to applied position so that brakes will be in applied position, to hold the weight ofthe pipe being rotated. t a

lIn drilling operations the drum 8 is employed or`pulling the string of pipe from and letting the same down into the bore and .for lifting and handling -'other heavy obadmit pliessure to the cylinder 57 to apply the brakes. The clutch valve mechanlsm maynow be operated to supply pressure to eithercylinder 31 or 32, so as to engage either clutch 22 or 23 as desired. This will operate through the corresponding rod 85 to rotate the valve 78 so as to in effect cross the lines 71, 71, as hereinbefore explainedyand release the brakes while either drum clutch is engaged. If it be desired to appl the brakes while either of said drum clutc es is engaged this may be done by reversing the lever66 of the brake valve mechanism.

The brake valve mechanism is of such construction that the pressure may be va-l ried so as to fully or only partly apply the brakes. This is accomplished by moving the ,y valve 62 to uncover only a sufhcient number "of the pressure ports70 to obtain the required pressiire', the greater number of parts uncovered, the greater the pressure in the cylinder 57 and vice versa.

l. Inwell drilling apparatus, draw Works embodying driving members and driven members, clutches for operatively connecting the respective driving membersy with, 15)

'sponding driven members, means connected and disconnecting them from, their correto the respective clutches to operate the same, mechanism ladapted to apply fluid pressure to said means to operate either clutch into engaged position and simultaneously to hold the other clutches in re- I l leased position at the will of the operator.

2.' In Well drilling apparatus, a draw works embodying a clutch for connecting and disconnecting a driving member and a driven member means adapted to be operated by fluid pressure, for operating said clutch into engagingor released position, a, brake adapted tobe applied to and released Yfrom said driven member, and a fluid pres-` sure controlling mechanism through which said brake may be applied or released.

3. In Well drilling apparatus, a draw Works embodying -a clutch for connecting and disconnecting a driving member and a drivenmember means adapted to be` operated by lluid pressure, for operating said clutch into engaging or-released position, a brake adapted to be applied to and released from said driven member, and`a fluid presl and releasedI from said driven `member,

brake controlling means through which Vfluid pressure maybe employed .to apply or release the brake. f i 5. In Well drilling apparatus, a draw Works embodying ardrivmg member and a driven member, a clutch through which Said members maybe operatively connected and disconnected, means through which' Huid pressure may be applied to operate said clutch, `a",brake arranged to be applied to, and released yfrom said driven member,

f Works embodying a brake controlling means through which Huid pressure may be employed to apply or release the brake, andan automatically operated reversing valve mechanismarranged to be operated by the clutch operating means to reverse the application of fluid pressure to the brake controlling means.

6. In vWellV drillin apparatus, a draw riving member and a driven member. a clutch through which Said members may be operatively connected and disconnected, clutch operating means adapted to be actuated by fluid pressure in said cylinder, means for controlling the application ofl pressure in saidcylinder to said operating means to engage or disengage the clutch, abrake arranged to be applied to and released from, said driven member. brake controlling means through which fluid pressure may be. em-

ployed to apply or release the brake.

7. In well drilling apparatus, a draw Works embodying a driving member and a driven member, a clutch through which said members may be operatively connected and disconnected, a fluid pressure cylinder, clutch operating means adapted to be actuated by fluid pressure in said cylinder, means for controlling the application of pressure in said cylinder' to said operating means to engage or disengage the clutch,` a brake arranged .to be applied to and released from, said driven member, brake controlling means through which fluid pressure may be employed to apply or release the brake, and a pressure reversing mechanism arranged a Huid pressure cylinder,

to be operated by the clutch operating means to automatically reverse the application of fluid pressurer to the brake controlling means.

In Well` drilling apparatus, a draw Works embodying driving members and driven tmembers, clutches through which said driving members may be operatively connected with and disengaged from the" corresponding driven members, Huid pressure cylinders, clutch adapted to be actuated by fluid pressure in the respective cylinders, means for controlling the application of fluid pressure in the respective cylinders to the respective ,clutch operating means to operate one of said clutches into either of said positions and simultaneously to operate the other clutches into the reverse position. f

'9. In well drilling apparatus, a draw Works embodying driving members and driven members, clutches through which said `driving members may be operatively connected with and disengaged from the corresponding driven \member`s, Huid pressure cylinders, clutch operating means adapted to be actuated by Huid `pressure in the respective cylinders, means for controlling ythe application of Huid pressure in the respective cylinders to the respective clutch operating means l operating means to operate one of said clutches into' either of said positions and simultaneously to operate the lo-therclutches into the reverse position, a brake arranged to be applied to, and released fromfone of the `driven members, brake vcontrolling means through which fluid pressure may be employed to apply or release Ithe brake.

10. In a well -drilling apparatus, a draw works embodying the driving members and driven members, clutches through which said ldriving members may be operatively con` nected with and disengaged from the corresponrling driven members, fluid pressure cylinders, clutch operating means adapted to be 1 actuated by luid'pressure in the respective cylin-ders, means for controlling the application of fluid pressure in the respective 'cylinders to the respective clutch operating means to operate one of said clutches into either ofsaid positions and simultaneously to operate the other clutches into the reverse position, a brake arrangement to be applied and released from, one .ofthe driven members, brake controlling means l-through` which fluid pressure may be .employedvto apply or release-fthe brake, and a pressure reversing mechanism arranged to be op erated by the operating means of the clutch associated wlth said last named driven mem ber to automatically reversev the application -of fluid pressure to said brake controllingand means for shifting the valve to com.-v municate said channels with the` respective' lines of either pair of fluid pressure lines.

12. fluid pressure reversing mechanism includlng a casing, pressure lines leading through the casing, a rotary valve in the casing formedi with a plurality of bores which form continuations of. said lines, and

means for rotatin said valve to align selected bores with the respective linesi 'means for rotating the valve.

including. a casing, a` pairof fluid pressure` lines leading through the casing, a rotary valve in the casing and provided with bores through`A which the fluid'pressure may pass directly through said lines, said valve being provided with other bores adapted to be 13. A fluid pressure reversing mechanism brought into registration with both of said v lines and through which the pressure fluidpassing through one line will be conducted' into the other line.

14. A fiuid pressure reversing mechanism including a casing, a pair of fluid pressurel lines leading throughl the casing, a rotary valve in the casing an-d provided with bores through which the fluid pressure may pass directly through saidlines, said-valve being provided with other bores adapted tobe brought into registration with both of sai'd lines and through which' the pressure fluid passing through one line will be conducted into the other line, and means for rotating said valve.

15. A fluidv pressure contro-lling valve mechanism including a valve casing formed with a seat having a pressure fluid inlet port and a relief port, pressure lines enteringthe cas1g,a rotary valve cooperating with the seat and having a cut away portion provided to permit communication between the inlet port and one of said lines when said valve is moved to! a predetermined position, .said valve having a channel connecting the other, line with the relief port when said valve is in said position.

16, A fluid pressure controlling valve mechanism including a valve casing formed with'a seat having a pressure fluid inlet port and a relief port, pressure lines ventering the casing, a rotary valve cooperating with the seat and vhaving a cutaway pory tion provided to permitcommunication bel -v tweenthe-inletv port-and one of said lines vwhen said valve is moved to a predetermined position, said valve having a channel connectmg the other line with the relief port when said valve is in` saidposition, and

In testimony whereof I have S1g'ned my name to-this specification in the presence of two subscribing wltnes'ses.

" t f LEE \WILKINSON.

VVitnesses:` s .f 5

V. HARDWAY, y JOHN WM. PALMER. p 

